<http://schema.org/availability>
"http://schema.org/OutOfStock"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.pfister.ch/it/produktdetail/180256/Marche/Stressless%C2%AE/Poltrona-Relax-Stressless%C2%AE-Magic-M>